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J. H. SHAW.

TRANSOM LIFTER. No. 312,024. Patented Feb.1'0, 1885.

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JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT 8: 00., OFSAME PLACE.

TRANSOM LIFTER.

SPECIFICATION forming part of Letters Patent No.3l2,024, dated February10, 1885.

Application filed September 22, 1884. (No model.)

To (LZZ whom, it may concern:

Be it known that I, JOHN H. SHAW, ofNew Haven, in the county of NewHaven and State of Connecticut, have invented anew Improvement inTransom-Lifters; and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in

Figure 1, the application of the lifter to the transom of adoor; Fig. 2,a side view of the same enlarged, a portion of the length broken away;Fig. 3, a transverse section through the rod and guide on line 00 00,looking up; Fig. 4, a vertical section through the socket, showing therod therein; Fig. 5, a-horizontal section through the socket.

This invention relates to an improvementin device for convenientlyoperating transoms over doors, and particularly to that class in which arod extends down upon the doorjamb, in connection with the transom, andwhereby the rod may be moved up or down to operate the transom, theobject of the invention being to bring the rod as close to the jamb aspossible, make a secure clamp whereby the rod may be fixed at anydesired position of adjustment; and the invention consists in theconstruction, as more fully hereinafter described, and particularlyrecited in the claims.

A represents the vertical rod. At its upper end it is provided with aslide, 13, having a dovetail groove upon its back side corre sponding toa fiat guide, 0, fixed to the jamb. This guide is thin, and so that theslide may run close to the jamb, the rod only escaping theface of theslide, as seen in Fig. 2. To the upper end of the slide, andsubstantially in axial line with the rod, the link D is hinged andextends into connection with the arm E, which is made fast to thetransom. This brings the hinged end ofthelink in direct line with therod, and thereby avoids cramping the slide upon its guide-a greatadvantage over constructions in which the link is attached outside therod. The rodA extends down through a socket, F, which is made fast tothe jamb. This socket embraces the rod, and terminates at its outer endin a screw, G, onto which a nut, H is set, and so that the base of thenut may bear upon the rod both above and below the socket,

as seen in Fig. 4.. In the socket and upon the baseaspring, I, isarranged to bear against the back side of the rod and force it out wardagainst the socket or nut. This spring serves as a friction upon the rodto prevent its too easy movement when the nut is loos- 6o ened, and alsoserves as a resistance against the nut, so that the rod is clampedbetween the spring and the nut. The base of the nut bears upon the rodboth above and below the socket, and this bearing is of so great extentthat the rod will not be defaced by it, as it is when a single pointedscrew extends into the socket, as in the more general construction. Thelower end of the rod terminates in a handle, L, by which it may be movedup or down through the socket and upon the slide in operating thetransom.

This construction of transonrlifter enables me to produce ahighly-finished rod, without fear of its being defaced in use, and alsoensocket constructed with a screw, G, and the nut H upon said screw,arranged to take a bearing upon the rod both sides the socket,substantially as described.

2. In a transom lifter, the combination of the rod A, arranged tooperate the transom, 0

the socket F, constructed for the passage of the rod through it, andwith ascrew, G, upon its outer end, a spring, I, upon the base ofthesocket, arranged to bear outward against the rod, and the nut H,arranged upon the set-screw to bear upon the rod both sides the socket,substantially as described.

JOHN H. SHAYV.

Witnesses:-

G. L. SARGENT, CHAS. L. BALDWIN.

